Question the radius of the earths orbit around the sun, Ask an Expert

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Question: The radius of the earth's orbit around the sun (assumed to be circular) is 1.5*10^8 km , and the earth travels around this orbit in 365 days.

a) What is the magnitude of the orbital velocity of the earth in m/s?

b) What is the radial acceleration of the earth toward the sun?

c) What is the magnitude of the orbital velocity of the planet Mercury (orbit radius= 5.79*10^7, orbital period = 88.0 days)?

d) What is the radial acceleration of the Mercury?

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